Abstract：Abstract: Accurate determination of aluminium, manganese and zinc in Lanthanum hydroxide is great significance for production and application.The samples were dissolved in nitric acid, 27Al, 55Mn and 64Zn were selected as isotopes, and the matrix effect was corrected by rhodium internal standard in 1% (V/V) nitric acid medium.A method for the determination of aluminium, manganese and zinc in Lanthanum hydroxide by Inductively coupled plasma mass spectrometry (ICP-MS) was developed.The effects of matrix concentration and internal standard elements on the determination were investigated. The results show that the matrix effect is not significant in the range of the mass concentration of the matrix. The calibration effect of Rh internal standard is better than that of cesium and indium internal standard.Rhodium (10.00 ng/mL) was selected as internal standard, and the concentration of lanthanum was controlled to 0.37 mg/mL. The experimental results show that the correlation coefficient of calibration curve is above 0.9995, the detection limit is 0.069 ppm~0.24 ppm, and the quantitative limit is 0.23 ppm~0.78 ppm.The relative standard deviation (RSD,n=11) was 1.22%~2.72% , and the recoveries were 90%~101%.
2024, Vol. 31 